Summary of all the considered interactions.

All possible combinations of these interactions form the space of networks whose dynamics were simulated. Text in italics signifies genes while upright text signifies proteins. A ‘’ indicates an inductive interaction while a ‘’ indicates a repressive interaction. The table is sparse because we assume that proteins can't regulate proteins and a gene can only regulate its corresponding protein. The circled interactions () were present in every network because these have been directly demonstrated by experiments. These include each gene producing its respective protein and Sp8 activating Fgf8. The other 24 interactions are possible but have not been directly demonstrated. We simulated the dynamics of the networks formed by all combinations of the possible interactions.